114 



COPE 



jaws interlocking in mastication; Animalivora. 



Crowns of teeth obtuse, not interlocking in 



mastication ; Frugivora. 



Fig. SO.Sntoptychus crassiramis 

 Cope ; a pocket-goplier from the Middle 

 Neocene of Oregon, natural size. Origi- 

 nal, c, lower jaw from above. 



Fig. 51. — Paloeolagus haydenii Leidy; 

 a rabbit from the lower Neocene of Col- 

 orado. Original ; natural size; a, ante- 

 rior half of skull, from below ; &, c, lower 

 jaw; (j, tibia and fibula, from front ;e, 

 tibia and fibula, from below. 



Animalivora appear in typical forms in the Lower 

 Eocene (Wasatch) in North America, and the Upper Eocene 

 (phosphorites) in France. 



The Frugivora (flying foxes) present a degenerate denti- 

 tion ; they are not known in the fossil state. 



The BuNOTHEEiA present four suborders, which are char- 

 acterized as follows : 



Molars 8 or more ; incisors several, with closed 

 roots ; 



Molars 7 or less ; incisors with closed roots, 

 not enlarged ; fibula distinct ; otic bulla 

 developed ; 



Pantotheria. 



Creodonta. 



